Pankaj travelled a distance of $21 k m$ in a marathon, starting from Supreme Business Park to back in Supreme Business Park again. His normal speed was was $7 k m / h r$ . The time taken by Pankaj is $3 x$ . What is $x$ .

Minutes

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Hours

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Seconds

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Pounds

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Solution

The correct option is C Hours
Distance travelled by Pankaj $D = 21 k m$

Speed $v = 7 k m / h r$

Time taken $t = \frac{D}{v}$

$⟹ t = \frac{21 k m}{7 k m / h} = 3 h$

Thus $x$ represents hours.

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Pankaj travelled a distance of 21km in a marathon, starting from Supreme Business Park to back in Supreme Business Park again. His normal speed was was 7km/hr. The time taken by Pankaj is 3 x. What is x.

The correct option is C HoursDistance travelled by Pankaj D=21 kmSpeed v=7 km/hrTime taken t=Dv⟹ t=21 km7 km/h=3 hThus x represents hours.

Pankaj travelled a distance of $21 k m$ in a marathon, starting from Supreme Business Park to back in Supreme Business Park again. His normal speed was was $7 k m / h r$ . The time taken by Pankaj is $3 x$ . What is $x$ .

The correct option is C Hours
Distance travelled by Pankaj $D = 21 k m$

Speed $v = 7 k m / h r$

Time taken $t = \frac{D}{v}$

$⟹ t = \frac{21 k m}{7 k m / h} = 3 h$

Thus $x$ represents hours.